The secret within

          @misc{ pirsa_PIRSA:11040090,
            doi = {10.48660/11040090},
            url = {https://pirsa.org/11040090},
            author = {Davis, Seamus},
            keywords = {Condensed Matter},
            language = {en},
            title = {The secret within},
            publisher = {Perimeter Institute},
            year = {2011},
            month = {apr},
            note = {PIRSA:11040090 see, \url{https://pirsa.org}}
          }
          

Abstract

Direct visualization of the electronic structure within each crystalline unit cell of a solid is a new frontier in condensed matter physics (M.J. Lawler et al, Nature 466, 347 (2010)). In this talk, I will introduce the techniques of spectroscopic imaging scanning tunneling microscopy (SI-­‐STM) and then explain how our new application of this technique allows visualization of the intra-­‐unit-­‐cell electronic structure. We use this approach to study the pseudogap phase of cuprate high temperature superconductors. Recent experiments provide evidence that this phase may be associated with spontaneously broken electronic symmetries. By studying the Bragg peaks in Fourier transforms of SI-­-STM images, and in particular by resolving both the real and imaginary components of these Bragg amplitudes (as opposed to the Bragg intensities without phase information which are the observables in scattering experiments), we reveal the intra-­‐unit-­‐cell broken electronic symmetries of the cuprate pseudogap phase (J.P.Hinton et al, Science (2011)).